Abstract

A method of quantitatively measuring structure breakdown and buildup of thixotropic substances using a weight-actuated viscometer was proposed. This approach eliminated the problems involved in obtaining the classical loop of hysteresis and furnished, instead, data on the actual rates of breakdown and buildup of the systems. Bentonite magmas of different concentrations were prepared, and the change in the apparent viscosity was measured as a function of time. The effects of concentration and shelfife on the static yield values of the systems were evaluated.

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